Wrench



(No Model.) 7 i A. ANDERSON.

WRENCH. 4

No. 498,348. Patented May 30, 1893.

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NITED STATES PATENT OFFI E.

AXEL ANDERSON, OF ATTLEBOROUGH, MASSACHUSETTS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 498,348, dated May 30, 1893.

I Application filed April 3, 1893. Serial 110.468,?78. (N0 model.)

To all whom it may concern.-

Be it known that I, AXEL ANDERSON, of Attleborough, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Wrenches; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to improvements in wrenches of that class especially designed for bicycle use, which requires great strength with lightness, and small bulk, with a wide range of opening capacity. It is fully illustrated both in manner of construction and operation in the accompanying drawings.

Figure 1, shows a side view of the wrench partly open. Fig. 2, is an edge View of the same. Figs. 3, 4, 5, 6 and 7, represent the parts separate, as will be explained hereinafter.

The inventionconsistsofthefollowingparts: two short, round bars, a, a, Fig. 3, made preferably, ofwhat is known as cold rolled or com pressed steel, because of its condensation and increased strength from the way it is made. These bars are slightly reduced in size for a short distance from their ends, by milling, to form slight shoulders c, c. A head or outer jaw A, (Fig. 5) is made of square bar steel, with one side milled off to the usual shape of the outer jaws of wrenches, and the two holes 8, are drilled in it, one near its large end and the other near its middle, of proper size to fit on the milled parts of the bars a, and another smaller hole 3 is drilled part way through the bar, midway between the holes .9, s, to receive one end of the screw d. Fig. 5, shows side and top views of the jaw. The inner jaw b, of which Fig. 6, shows inside and outside views, is made of steel casting, or bydrop forging, and is similar in shape to the outer jaw, with the addition of a short sleeve 'n, that projects out on one side around one of the holes which are made through the jaw to exactly correspond with the holes 8, described in the outer jaw, only enough larger to allow the bars a, to slide easily in them. A hole o, is made through this inner jaw, to correspond with the step hole 8', in the outer jaw, and a screw thread is made in the hole to receive l. the screw-d. A light cross piece or block j, is made with two of its corners rounded (see top and edge viewsFig. 7). Two holes 0, o, are made in the edge of this block, corresponding in size and position with the holes 3, s, in the outer jaw A, to receive the milled parts of the bars a, a. A screw d, Fig. 4;, has about one-half of its length reduced somewhat, and a screw thread made on it to fit the thread in the hole 1;, in jaw b, and the other half of the piece 25, larger in diameter, has a knurled figure made on it, or is otherwise roughened, to enable the thumb to easily turn it when the wrench is held in the hand.

The ends of the screw d, are milled down to form steps or journals to fit in the holes .9 and i, in the jawA, and block j, respectively.

The wrench is put together by first putting an end of one bar a, in one of the holes 3, in the jaw A, and an end of the other bar a, in the other hole 8, and riveting them on the outside, the holes being countersunk on that side for that purpose. The jaw b, is then put on the bars a, and slid up toward the jaw A, and

the screw 01', is turned in through the hole 11,

until its smaller end enters the step hole 5'. Thenthe block j, is put on the free ends of the bars a, which enter the outer holes g, in the block, and are held there by having pins put through them and the block. The outer end of the screw d, is at same time entered in the hole 2'. The wrench is then ready for use. It is held across the inside of the hand on the fingers, with the thumb resting on the roughened part 15, of the screw, and by pushing the thumb slightly in either direction, the screw d, will be turned, and the jaws opened or closed, according to the direction the thumb is moved. The length of the rough part 15,

makes it easy to find it with the thumb, and

gives a large surface to turn the screw by.

The bars a, and block j, form the handle, and reduce the weight of the wrench .onethird, as compared ith wrenches of like capacity with parallel b rs that slide into a solid handle, and its len th is reduced one-half, as compared with hes with parallel bars and a handle beyond th as 111 NQ 170,492, granted t ll, Port, November 30,

1875. These features espe i ly d pt it for use as a bicycle and pocket wrench.

Having thus described the constructionand characteristics of my improved wrench, what I claim as my invention is- A wrench consisting of a pair of round bars having one end of each bar made fast in a head or outer jaw, and their other ends in a short block, a loose jaw arranged to slide on said bars, and a screw located between said bars and having journal steps in the outer jaw, and the end block, with a screw thread made on one part of it, fitting in an internal screw IO thread made in a hole in the inner jaw, and having a larger portion knurled or otherwise roughened, the bars and block forming the handle, substantially as set forth.

AXEL ANDERSON. Witnesses:

BENJ. ARNOLD, E. B. READ. 

